Electromagnetic damper for rotating machines
AssigneeROLLS-ROYCE plc
InventorsAndrea Tonoli, Mario Silvagni
Life of this patent
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Abstract
Electromagnetic damper (1) for rotating machines (100) having at least a stator (103) and a rotating shaft (100); the electromagnetic damper (1) is able to damper the vibrations of the rotating machine (100) during its functioning. The damper includes windings (2) of electrically conducting material, for generating a magnetic field; a magnetic circuit (4), for conveying within it a magnetic flux generated by the windings (2); a power supply (8), for supplying the windings (2) of electrically conducting material; the power supply (8) of the electromagnetic damper (1) is positioned inside the rotating machine (100).
Claims13
An electromagnetic damper for rotating machines having at least a stator and a rotating shaft;
- said electromagnetic damper being configured to damp vibrations of said rotating machine during functioning and comprising:
- a plurality of windings of electrically conducting material, the circuit generating a magnetic field;
- a magnetic circuit conveying within a magnetic flux generated by said plurality of windings;
- a power supply supplying said windings of electrically conducting material;
- wherein said power supply is positioned inside said rotating machine and comprises a generator or alternator, the generator or alternator being directly connected to the rotating shaft and is permanently connected to the windings to automatically supply electric power to the windings at all times while the shaft is rotating;
- and
- the magnetic circuit comprises a first internal part and a second internal part, the first internal part and the second internal part being coaxial and defining an air gap between the first internal part and the second internal part, wherein in use, intensity of the magnetic flux varies as size of the air gap varies to damp vibrations.
Dependencies are inferred from the claim text.